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How can i convert this scanned file to general JPEG/PNG?

I used scanimage --mode=color --format=tiff > /tmp/testing.tiff from a scanner

$ convert -seperate testing.tiff testing.jpeg
convert: unrecognized option `-seperate' @ error/convert.c/ConvertImageCommand/2667.

$ convert -seperate -format jpg testing.tiff testing.jpg
convert: unrecognized option `-seperate' @ error/convert.c/ConvertImageCommand/2667.
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up vote 8 down vote accepted

The command is convert -separate image1 image2, no need for further options.

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you don't even need the -separate bit. "convert image_from.tiff image_to.png" works well etc. – Grizly Jan 28 '14 at 4:30

Try -separate instead of -seperate

Reference: convert man page

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Have you tried this converter?

Download the file, right-click on it, go to the permissions tab and check the "Allow to execute this file as a program" box.

Go to your home folder, press CTRL+H (you will see the hidden files), copy and paste the file to .gnome2>Nautilus scripts.

Close Nautilus, right-click on the file you want to convert, go to Scripts, click on the converter, and follow the instructions.

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